Improvement in processes of charring the interior of barrels, casks



UNITED STATES PATENT QFFICE.

WILLIAM MOMURTRIE, OF OXFORD TOWNSHIP, WARREN COUNTY, N. J.

IMPROVEMENT lN PROCESSES 0F Cl-IARRING THE INTERIOR 0F BARRELSrCASKS, &C.

Specification forming part of Letters Patent No. 193,826, dated August 7, 1877; application filed February 15, 1877.

To all whom it may concern Be it known that 1, WILLIAM MCMURTRIE, of the township of Oxford, in the county of Warren and State of New Jersey, have invented a new and useful method for charring to any desired extent the interior of barrels, casks, or other vessels of wood destined to contain distilled alcoholic spirits, or for other purposes, of which the following is a specification:

Into the barrels, casks, or' other vessels in question I introduce air previously heated to any temperature above that at which wood a will char, (about 160 centigrade,) or steam or other gases heated to any temperature above 230 centigrade, according to the degree of charring desired, in order to produce over the entire internal surface of the vessel a stratum of charcoal of uniform thickness and quality.

The air or gases may be introduced in any ponvenient manner, by which the temperature of the same may be readily observed-as, for

previously to any temperature above 160 centigrade, or steam or gases previously heated to any temperature above 230 centigrade, according to the degree of charring desired, substantially as described.

WM. MGMURTRIE.

- Witnesses:

B. L. PACKARD, THOMAS C. GoNNoLLY. 

